A parking number sign that perfectly integrates industrial aesthetics and practical functions. Designed with highprecision aluminum alloy slide rails and damping rollers, the number plate slides out smoothly with a light push of the finger; With a gentle flick, it instantly hides. The shell is made of aviation grade aluminum alloy and has undergone multiple processes such as CNC cutting, anodizing, sandblasting, etc., with a delicate touch like a MacBook. The number is laser engravedUV processed and will never fade